Telephone attachment.



PATENTED JULY S1, 1906 APPLIOATION FILED OOT.17, 1905.

I INVENTOR: EWYTEJSWZL WITNESSES:

By his Azzomey ear-ran earns afnnr @FFJIGE.

-' HOMER ERASTUS SMITH, OF NORWICH, NEW YORK.

TELEPHONE ATTACHMENT- Specification of Letters Patent:

Patented July 31, 1906.

Application iii 33. October 17,1905. Serial No. 283.196.

ToaZZ whont it may concern.-

Be it known that I, HOMER ERASTUS SMITH, a citizen of the United States, residing at Norwieh, in the county of- Chenango and State of 'New York, have invented new and useful.

the introduction of automatic telephone 'sys' tems intended to avoid thenecessity for central offices.

The object of the present invention is to improve the construction of telehones in such manner as to cause the talk1ng-circuit to be automatically broken as soon as the subscriber has finished "his conversation, whereby the necessity of depending upon the subscriber to hang up his receiver is obviated.

With the foregoing .and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed as a practical embodiment thereof.

In the accompanying drawings, forming part of this specification, Figure 1 is a front elevation of a telephone equipped with the improvements of the present invention. Fig.

2 is a view showing the telephone-casing in section and the improvements of the present invention in side elevation. Fig. 3 is a' sectional view showing the improved attachment.

. Like reference-numerals indicate corresponding parts in the different figures'of the drawings.

The reference-numeral 1 indicates a telephone-casing having the.,bells 2 and the sounder 3, all of which may be of any suitable form and construction. The bell and talklng circuits are arranged in the usual and well-known mannerand are adapted to be controlled by the switch 4, which is formed at its outer end with an eye 5 The switch 4 preferably is so arranged that when it is. in its upper position -it closes the bell-circuit,

thus permitting the bell to be sounded from the central office, and when in its lower position it closes the talking-circuit in the old and well-known manner.

Resting against the casing 1 is a bed-plate 6, to which is secured, by means of screws or other suitable devices 7, a casing 8, having a removable cover 9, formed, preferably, in its center, with an opening having a bushing 10.

,Mounted within the casing 8 upon an axle or spindle 11 is a wheel 12, which is formed on its periphery with a groove 13 and on one of its sides with a groove 14. The wheel 12 is also formed at its central portion with an annular chamber 15, in which is mounted a coil or volute spring 16, secured at its inner end in any suitable manner to the spindle and at its outer end to the wheel 12. The wheel 12 preferably is formed with a lateral perforation 17, which is adapted to register at one point in the revolution of the wheel with a socket 18 in the bed-plate 6.

Connected with the casing 1 are the usual conductors, (indicated by 19,) which extend through the bushing and into the groove 14, from which they pass through a suitable opening into the groove 13. After being wound several times around the wheel 12 the conductors 19 pass outward through a tangential extension 20 of the casing 8, said exers 21to facilitate the improvement of the conductors. After leaving the extension 20 the conductors 19 pass downward through the eye 5 in the switch 4 and are connected in the usual manner with the telephone-re ceiver 22. Above the receiver 22 the conductors 19 preferably are provided with any suitable enlargement or ball, such as 23.

' In assembling the different parts of the improved telephone attachment the wheel 12 preferably is rotated several times to place the spring '16 under the proper tension. An awl or other suitable implement is then passed through the opening 17 into the socket '18 to prevent the coil spring 16 from unwinding. The conductors 19 are then threaded through the bushing 19 and are placed upon the wheel 12 in the manner described, after which the awl is removed, so as to permit the spring to unwind and take up all the slack in the conductors, thus bringing the enlargement 23 into contact with the eye 5 of the switch 4 and causing said switch to close the bell-circuit and open the talkingcircuit in the old and well-known manner.

As soon as the receiver 22 is grasped in the action. of psing the phone the spring 24, which is connected with the ,switch 4, as shown in Fig. 2, is permitted to operate the switch in such manner as to open the bellcircuit and close the talking-circuit. In view of the fact that the coil-spring 16 will always act to draw the enlargement 23 into contact with the switcli 4 as soon as the conversation has been finished the possibility of subjecting the central operator to annoyance and trouble by neglecting to hang up the receiver is effectually avoided.

Changes in the precise embodiment of invention illustrated and described may be made within the sco e of the following claim without departing f iom the spirit of the in vention orsacrificing any of its advantages.

Having thus described the invention, what is claimedas new is i A combination with a telephone having a receiver and flexible conductors connected therewith, of a switch having an eye to receive the flexible conductors, a casing having a tangential tubular extension, a removable cover having an opening in the center thereof, a Wheel mounted in the casing and having a groove in its periphery and a groove in its side, and a coil-spring to operate the Wheel, the flexible conductors of the telephone being threaded through the opening in 'the cover and extending into the groove into HOMER ERASTUS SMITH.

Witnesses:

O. BELLE Goonmcn, K. P. GREGORY. 

